Grounding interlock of upper-isolation and lower-circuit-breakage ring main unit and ring main unit
By using components such as electromagnetic locks and live indicators in the upper isolation lower circuit breaker ring main unit, the energization and grounding status of the cables are detected, and the control baffle blocks the closing button, thus eliminating the risk of the cable compartment door being opened when the cable is not grounded, ensuring operational safety and access control.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CEEPOWER CO LTD
- Filing Date
- 2025-05-15
- Publication Date
- 2026-06-05
Smart Images
Figure CN224328612U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of ring main unit with upper isolation and lower circuit breaker, and particularly to a grounding interlocking mechanism and ring main unit for a ring main unit with upper isolation and lower circuit breaker. Background Technology
[0002] The existing grounding interlocking mechanism for the upper circuit breaker and lower isolating ring main unit requires that the cable be grounded and the door can be opened after the circuit breaker is opened, the isolating switch is opened, and the grounding switch is closed. The grounding interlocking mechanism for the upper circuit breaker and lower isolating ring main unit only requires that the door be opened after the grounding switch is closed. The de-energizing sequence for the upper isolating and lower circuit breaker ring main unit is: circuit breaker open, isolating switch open, grounding switch closed, circuit breaker closed, cable grounded, and then the door can be opened.
[0003] In existing ring main units with an upper circuit breaker and a lower isolator, the grounding switch and the cable compartment door are typically interlocked via grounding interlocking. However, in ring main units with an upper isolator and a lower circuit breaker, the cable compartment door can only be opened when both the grounding switch and the circuit breaker are closed and the cable is grounded. If the upper isolator and lower circuit breaker ring main unit continues to use the grounding interlocking mechanism, it could lead to the cable compartment door being opened without the cable being grounded, creating an unexpected risk. Utility Model Content
[0004] Therefore, it is necessary to provide a grounding interlocking system for an upper-isolated lower-circuit breaker ring main unit and a ring main unit, in order to solve the technical problem that if the grounding interlocking system of the upper circuit breaker mechanism and the lower-isolated ring main unit is used, the cable compartment door will be opened when the cable is not grounded, which will cause unexpected risks.
[0005] To achieve the above objectives, in a first aspect, this utility model provides a grounding interlocking mechanism for a ring main unit with an upper isolation circuit breaker and a lower circuit breaker, comprising:
[0006] An electromagnetic lock, comprising a live indicator and a locking tongue, wherein the live indicator is used to detect the live status of the incoming cable in the cable compartment of the ring main unit;
[0007] Mounting bracket, which is connected to the electromagnetic lock, is used to install on the circuit breaker mechanism;
[0008] A baffle is mounted on one side of the latch, and the other side of the baffle is used to block the closing button of the circuit breaker mechanism.
[0009] As one embodiment of this utility model, the grounding interlock of the upper isolation lower circuit breaker ring network cabinet also includes a support plate, which is used to install on the circuit breaker mechanism and is located behind the baffle.
[0010] In this way, by setting up support plates, the baffle can be supported and prevented from deforming after long-term use.
[0011] In one embodiment of this utility model, the support plate is L-shaped.
[0012] In this way, by utilizing the right-angle support characteristics of the L-shaped support plate, a stable mechanical support triangle is formed behind the baffle, which effectively resists the impact force of operation and prevents the baffle from failing to lock due to long-term stress deformation.
[0013] As one embodiment of this utility model, the baffle is S-shaped.
[0014] In this way, the internal structure of the ring main unit is compact, and the S-shaped baffle can bypass the protruding parts on the circuit breaker operating panel (such as indicator lights and trip buttons), avoiding interference with surrounding components. In addition, the S-shaped baffle can reduce stress concentration, thereby reducing deformation caused by accidental impacts from workers or prying by tools.
[0015] As one embodiment of this utility model, the grounding interlock of the upper isolation lower circuit breaker ring main unit also includes a key lock, which is connected to an electromagnetic lock.
[0016] Thus, by linking the key lock and the electromagnetic lock, the circuit breaker mechanism is further protected against accidental activation of the closing button. In actual use, operators must simultaneously meet both electrical requirements (grounding completed) and physical authorization (key unlocking) to release the barrier lock via the electromagnet. This not only complies with the requirements for hierarchical management of power operation permissions but also prevents unauthorized entry or misoperation.
[0017] As one embodiment of this utility model, the grounding interlock of the upper isolation lower circuit breaker ring network cabinet also includes mounting fasteners, and one side of the baffle is mounted on the lock tongue by mounting fasteners.
[0018] Thus, the fasteners allow for detachable connection between the baffle and the locking tongue, facilitating the replacement of different baffles for different ring main units. These fasteners can be bolts, screws, studs, etc.
[0019] In one embodiment of this utility model, the other side of the baffle is arc-shaped.
[0020] In this way, the arc shape matches the outer surface of the closing button, forming a wrap-around cover, thereby reducing the possibility of inserting tools (such as screwdrivers) from the side gaps, thus providing a better blocking effect.
[0021] To achieve the above objectives, secondly, this utility model also provides a ring main unit, comprising:
[0022] air box;
[0023] The mechanism room contains a circuit breaker mechanism and a three-position switch mechanism. The circuit breaker mechanism is equipped with a closing button and a grounding interlock for the upper isolation lower circuit breaker ring network cabinet as provided by the inventor above.
[0024] The cable room is located below the mechanism room and contains the incoming cable.
[0025] Unlike existing technologies, the above technical solution uses a locking or unlocking electromagnetic lock to control the horizontal movement of the baffle, blocking the closing button of the circuit breaker mechanism and preventing accidental activation. The closing coil is activated only when the three-position switch mechanism is grounded and the cable is de-energized, as determined by the microswitch of the three-position switch mechanism and the live indicator. Therefore, both manual and electric closing are possible. Manual unlocking of the electromagnetic lock requires the grounding switch to be grounded and the live indicator to confirm no power. If the line suddenly becomes energized, the live indicator immediately triggers the electromagnetic lock to re-lock, and the baffle automatically resets to block the button, preventing operation by personnel while the circuit is energized.
[0026] The above description of the utility model is merely an overview of the technical solution of this application. In order to enable those skilled in the art to better understand the technical solution of this application and to implement it based on the description and drawings, and to make the above-mentioned objectives and other objectives, features and advantages of this application easier to understand, the following description is provided in conjunction with the specific embodiments and drawings of this application. Attached Figure Description
[0027] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of specific embodiments of this application and other related content, and should not be considered as limitations on this application.
[0028] In the accompanying drawings of the instruction manual:
[0029] Figure 1 This is a schematic diagram of the structure of the mechanism chamber according to one embodiment of this application;
[0030] Figure 2 This is a partial enlarged view of a circuit breaker mechanism according to an embodiment of this application;
[0031] Figure 3 This is another partial enlarged view of a circuit breaker mechanism according to an embodiment of this application;
[0032] Figure 4 This is a schematic diagram of the grounding lockout structure according to an embodiment of this application;
[0033] Figure 5 This is a schematic diagram of the electromagnetic lock in the locked state according to an embodiment of this application;
[0034] Figure 6 This is a schematic diagram of the unlocking state of an electromagnetic lock according to an embodiment of this application;
[0035] Figure 7 This is a partially enlarged view of a grounding lockout according to an embodiment of this application.
[0036] The reference numerals used in the above figures are explained as follows:
[0037] 100 - Mechanism room; 1 - Three-position switch mechanism; 2 - Circuit breaker mechanism; 21 - Grounding interlock; 211 - Electromagnetic lock; 2111 - Lock tongue; 212 - Mounting bracket; 213 - Baffle; 214 - Support plate; 215 - Key lock; 216 - Mounting fastener; 22 - Closing button. Detailed Implementation
[0038] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.
[0039] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.
[0040] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.
[0041] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.
[0042] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.
[0043] Without further limitations, the use of terms such as “comprising,” “including,” “having,” or other similar open-ended expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.
[0044] As understood in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.
[0045] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.
[0046] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral arrangement; it can be a direct connection or an indirect connection through an intermediate medium; it can be a relationship of two components combined together, an interaction relationship between two components, or a connection within two structures. Those skilled in the art to which this application pertains can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.
[0047] In existing ring main units with an upper circuit breaker and a lower isolator, the grounding switch and the cable compartment door are typically interlocked via grounding interlocking. However, in ring main units with an upper isolator and a lower circuit breaker, the cable compartment door can only be opened when both the grounding switch and the circuit breaker are closed and the cable is grounded. If the upper isolator and lower circuit breaker ring main unit continues to use the grounding interlocking mechanism, it could lead to the cable compartment door being opened without the cable being grounded, creating an unexpected risk.
[0048] In view of this, this application provides a grounding interlock 21 for a ring main unit with an upper isolation circuit breaker, including an electromagnetic lock 211, a mounting bracket 212, and a baffle 213. The electromagnetic lock 211 includes a live indicator and a latch 2111. The live indicator is used to detect the live status of the incoming cable in the cable compartment of the ring main unit. The mounting bracket 212 is connected to the electromagnetic lock 211 and is used to be installed on the circuit breaker mechanism 2. One side of the baffle 213 is installed on the latch 2111, and the other side of the baffle 213 is used to block the closing button 22 of the circuit breaker mechanism 2.
[0049] According to some embodiments of this application, please refer to Figures 1 to 3 This embodiment relates to a ring main unit, including a gas box, a mechanism chamber 100 and a cable chamber. The mechanism chamber 100 is equipped with a circuit breaker mechanism 2 and a three-position switch mechanism 1. The circuit breaker mechanism 2 is equipped with a closing button 22 and a grounding interlock 21 for the upper isolation and lower circuit breaker ring main unit. The cable chamber is located below the mechanism chamber 100 and is equipped with an incoming cable.
[0050] The three-position switch mechanism 1 is located above the circuit breaker mechanism 2, which is closer to the cable compartment.
[0051] The ring main unit with the upper isolator and lower circuit breaker must strictly follow the sequence of "circuit breaker opening → isolating switch opening → grounding switch closing → circuit breaker closing". If the operator mistakenly attempts to close the circuit breaker before grounding, it will cause a live ground short circuit. Therefore, a grounding interlock 21 is installed in the mechanism room 100. When the grounding switch is not closed, the grounding interlock 21 remains in the locked state, and the closing button 22 is blocked, forcing the operator to complete the grounding procedure before proceeding with subsequent operations.
[0052] According to some embodiments of this application, please refer to Figures 4 to 7This embodiment also relates to a grounding interlock 21 for a ring main unit with an upper isolation circuit breaker, including an electromagnetic lock 211, a mounting bracket 212, and a baffle 213. The electromagnetic lock 211 includes a live indicator and a latch 2111. The live indicator is used to detect the live status of the incoming cable in the cable compartment of the ring main unit. The mounting bracket 212 is connected to the electromagnetic lock 211 and is used to be installed on the circuit breaker mechanism 2. One side of the baffle 213 is installed on the latch 2111, and the other side of the baffle 213 is used to block the closing button 22 of the circuit breaker mechanism 2.
[0053] Optionally, the live indicator can not only display the live status, but also feed back the live status to the electromagnetic lock 211, so that the electromagnetic lock 211 can control the extension or retraction of the locking tongue 2111 through the control device, thereby controlling the baffle 213 to block or release the closing button 22 of the circuit breaker mechanism 2.
[0054] The mounting bracket 212 can be integrally formed with the electromagnetic lock 211. The mounting bracket 212 can be bolted to the circuit breaker mechanism 2, which facilitates installation and disassembly.
[0055] like Figure 5 As shown, the electromagnetic lock 211 is in the locked state, with the latch 2111 extended and the baffle 213 blocking the closing button 22 of the circuit breaker mechanism 2. To unlock, as... Figure 6 As shown, the electromagnetic lock 211 moves to the left in the horizontal direction, the locking tongue 2111 retracts, and the baffle 213 also moves to the left in the horizontal direction to release the closing button 22 of the circuit breaker mechanism 2.
[0056] The above technical solution allows the electromagnetic lock 211 to be locked or unlocked, controlling the horizontal movement of the baffle 213 to block the closing button 22 of the circuit breaker mechanism 2, thus preventing accidental activation of the closing button 22. The closing coil can only operate when the three-position switch mechanism 1 is grounded and the cable is de-energized, as determined by the microswitch of the three-position switch mechanism 1 and the live indicator. Therefore, both manual and electric closing are possible. Manual unlocking of the electromagnetic lock 211 requires the grounding switch to be grounded and the live indicator to confirm no power. If the line suddenly becomes energized, the live indicator immediately triggers the electromagnetic lock 211 to re-lock, and the baffle 213 automatically resets to block the button, preventing operation by personnel while the line is energized.
[0057] like Figure 4 As shown, the grounding interlock 21 of the upper isolation lower circuit breaker ring network cabinet also includes a support plate 214, which is used to install on the circuit breaker mechanism 2 and is located behind the baffle 213.
[0058] Thus, by setting the support plate 214, the baffle 213 can be supported, preventing the baffle 213 from deforming after long-term use.
[0059] like Figure 4 As shown, the support plate 214 is L-shaped.
[0060] In this way, by utilizing the right-angle support characteristics of the L-shaped support plate 214, a stable mechanical support triangle is formed behind the baffle 213, which effectively resists the impact force of operation and prevents the baffle 213 from failing to lock due to long-term stress deformation.
[0061] like Figure 4 As shown, the baffle 213 is S-shaped.
[0062] In this way, the internal structure of the ring main unit is compact, and the S-shaped baffle 213 can bypass the protruding parts (such as indicator lights and trip buttons) on the circuit breaker operating panel, avoiding interference with surrounding components. In addition, the S-shaped baffle 213 can reduce stress concentration, thereby reducing deformation caused by accidental impacts from workers or prying by tools.
[0063] like Figure 7 As shown, the grounding interlock 21 of the upper isolation lower circuit breaker ring main unit also includes a key lock 215, which is connected to the electromagnetic lock 211.
[0064] The connection between the key lock 215 and the electromagnetic lock 211 is existing technology. For example, the rotating shaft of the key lock 215 and the locking rod of the electromagnetic lock 211 are rigidly connected through a coupling. When the key is turned, it directly drives the mechanical unlocking mechanism of the electromagnetic lock 211. Therefore, the electromagnetic lock 211 can only be unlocked manually after being unlocked by the key, which provides dual protection and prevents unauthorized personnel from unlocking the electromagnetic lock 211.
[0065] Thus, by linking the key lock 215 with the electromagnetic lock 211, the accidental activation of the closing button 22 of the circuit breaker mechanism 2 is further protected. In actual use, personnel must simultaneously meet both electrical conditions (grounding completed) and physical authorization (key unlocking) to release the latch 213 via the electromagnet. This not only complies with the requirements of hierarchical management of power operation permissions but also prevents unauthorized entry or misoperation.
[0066] like Figure 7 As shown, the grounding interlock 21 of the upper isolation lower circuit breaker ring network cabinet also includes a mounting fastener 216, and one side of the baffle 213 is mounted on the locking tongue 2111 by the mounting fastener 216.
[0067] Thus, the fastener 216 facilitates the detachable connection between the baffle 213 and the locking tongue 2111, allowing for easy replacement of different baffles 213 for different ring main units. The fastener 216 can be a bolt, screw, or stud, etc.
[0068] like Figure 4 As shown, the other side of the baffle 213 is arc-shaped.
[0069] The other side of the baffle 213 is arc-shaped, meaning the contact surface with the outer surface of the closing button 22 is arc-shaped. Therefore, the other side of the baffle 213 can be partially or entirely arc-shaped.
[0070] In this way, the arc shape matches the outer surface of the closing button 22, forming a wrap-around cover, thereby reducing the possibility of inserting tools (such as screwdrivers) from the side gaps, thus providing a better blocking effect.
[0071] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection for this utility model. Therefore, any changes and modifications made to the embodiments described herein based on the innovative concept of this utility model, or equivalent structural or procedural transformations made using the content of this utility model's specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields, are all included within the scope of patent protection for this utility model.
Claims
1. A grounding interlocking mechanism for a ring main unit with an upper isolator and a lower circuit breaker, characterized in that, include: An electromagnetic lock, comprising a live indicator and a locking tongue, wherein the live indicator is used to detect the live status of the incoming cable in the cable compartment of the ring main unit; Mounting bracket, which is connected to the electromagnetic lock, is used to install on the circuit breaker mechanism; A baffle, one side of which is mounted on the locking tongue, and the other side of which is used to block the closing button of the circuit breaker mechanism.
2. The grounding interlocking of the ring main unit with upper isolation and lower circuit breaker as described in claim 1, characterized in that, The grounding interlock of the upper isolation lower circuit breaker ring main unit also includes a support plate, which is used to install on the circuit breaker mechanism and is located behind the baffle.
3. The grounding interlocking of the ring main unit with upper isolation and lower circuit breaker as described in claim 2, characterized in that, The support plate is L-shaped.
4. The grounding interlocking of the ring main unit with upper isolation and lower circuit breaker as described in claim 1, characterized in that, The baffle is S-shaped.
5. The grounding interlocking of the ring main unit with upper isolation and lower circuit breaker as described in claim 1, characterized in that, The grounding interlock of the upper isolation lower circuit breaker ring main unit also includes a key lock, which is connected to the electromagnetic lock.
6. The grounding interlocking of the ring main unit with upper isolation and lower circuit breaker as described in claim 1, characterized in that, The grounding interlock of the upper isolator and lower circuit breaker ring main unit also includes mounting fasteners, and one side of the baffle is mounted on the locking tongue by the mounting fasteners.
7. The grounding interlocking of the ring main unit with upper isolation and lower circuit breaker as described in claim 1, characterized in that, The other side of the baffle is curved.
8. A ring main unit, characterized in that, include: air box; The mechanism room is equipped with a circuit breaker mechanism and a three-position switch mechanism. The circuit breaker mechanism is equipped with a closing button and a grounding interlock of the upper isolation lower circuit breaker ring network cabinet as described in any one of claims 1 to 7. A cable compartment is located below the mechanism compartment, and an incoming cable is installed inside the cable compartment.